Thread-cutting jaw temple for looms



Sept. 16, 1930. H. H. BURDETT TERBAD CUTTING JAW TEMPLE FOR LOOMS Filed Dec. 9, 1929 2 Sheets-Sheet l MVEM'OTI Horace Burdeif Afiys.

Sept. 16, 1930. H, H, BURDET k, 1,776,229

THREAD CUTT ING- JAW TEMPLE lOR LOOIS Filed Dec. 9, 1929 2 Shoets-$hoet 2 lnvenron Horace H. Burden byv' w Maw Patented Sept. 16, 1930 UNITED ST TES HORACE H. BURDETT, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR T0 DRAPER CORPO- RATION, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE THREAD-CUTTING JAW TEMPLE FOR LOOMS Application filed December 9, 1929.

This invention relates to the jaw type of loom temple which acts to release the cloth at the conclusion of each beat-up of the lay and immediately to grip the cloth as the lay retracts thus to hold the cloth up to the required width during the weaving operation.

The object of the invention is to provide this jaw type of loom temple with an efficient and positively acting thread cutting or filling severing device acting with each opening and closing movement of the temple to sever the filling ends extending from the cloth pass ing between the jaws.

The object of the invention is further to provide in the jaw type of loom temple a filling severing mechanism comprising cooperating shearing blades, one of which is attached to each jaw and readily removable therefrom for repair or replacement;

The object of the invention is further to provide such a mechanism in which the shearing blades are relatively movable laterally to insure the required shearing engagement while each is relatively immovable in the direction of the opening and closing movement with respect to the jaw on which it is mounted.

These andother objects and features of the invention will appear more fully from the accompanying description and drawings and will be particularly pointed out in the claims.

The temple illustrated in the drawings as embodying a simple and preferred form of the invention is the same as that illustrated in the pending application of Clare H. Draper, No. 37 8,987 filed July 17 1929, wherein, while the filling severing or thread cutting mechanism herein shown was illustrated, it was noted that such mechanism formed no part of the invention there claimed.

In the drawings:

Fig. 1 is a side elevation of a temple embodying a preferred form of the invention with the jaws and shearing blades shown in closed position.

Fig. 2 is a similar View, together with the lay in position atthe conclusion of the beatup and with the device in open position.

Serial No. 412,710.

Fig. 3 is a top plan view of the construction shown in Fig. 1.

Fig. i is a view in side elevation looking at the opposite side of the temple shown in Fig. 1. i

Fig. 5 is a front elevation of the temple.

Fig. 6 is a View similar to Fig. 2 with a portion of the upper blade broken away and with the cam lever for operating it removed.

The temple illustrated is shown as for the right-hand side of the loom and comprises a shank 1 mounted. to slide in the stand 2 secured to the breast beam in the usual manner. The shank 1 is provided witha depending heel 8 by which it is given a slight forward movement upon'the conclusion of the beat-up of the lay 4:. A spring, not illustrated, in the stand 2 projects the shank to rearward position in accordance with the usual practice.

The temple jaws.are vertically separable and, in the preferred construction shown, this is secured by making the lower jaw fixed and providing for the vertical swinging movement of the upper jaw toward and from the lower jaw. Thus the lower jaw 5 is formed integral with the shank and projects laterally therefrom presenting an extended fiat face over which the cloth 6 passes. The upper jaw 7 presents an opposed cooperating flatface of similar dimensions to that of the-lower jaw and is formed integrally with an arm 8 by means of which it is hinged to the temple shank. For that purpose the temple shank is provided with an extended bearing 9 in which is journalled a shaft 10.

The arm 8 is secured to the shaft 10 by being clamped against a shoulder on the shaft b a nut 11 on the threaded end of the shaft. The upper jaw is moved or swung to closed or clamping position, in the form illustrated, by a coiled spring 12 seated between a projection 13 of the shank and a projection 14 of the jaw, studs 15 being provided on these projections to hold the spring in position.

The upper jaw is moved or swung to open position, in the preferred form of the invention,by means of a cam lever depending from the temple in the path of the lay and acting, when moved by the lay at the conclusion of the beat-up, thus to separate the jaws by swinging the upper jaw to open position and releasing the cloth. This lever 16 is fulcrumed on a stud 17 secured in the shank 1 and is held thereon by a cotter pin 18. The upper end of the lever is cam shaped presenting a flat surface 19 underlying the lower edge of the arm 8 when the jaws are closed and an eccentric shoulder 20 which cams the arm 8 upward when the lever is swung forward. The lower end of this lever is formed with a depending heel which stands well rearward of the heel 3 when the jaws are closed and which, when engaged by the lay upon the conclusion of the beat-up, is moved forward thereby and rocks about itsfulcrum 17 thus to cam the upper jaw into open position, as shown in Figs. 2 and 6. j

The cooperating faces of the two jaws, so

5 far as the present invention is concerned, may

be provided with any suitable means or may be suitably formed or conditioned to insure the proper gripplng and retaining of the cioth when the jaws are closed. In the construction illustrated, removablerectangular inserts 22 of wood or similar material are shown set into the faces of the jaws and held in place by screws 23. Such inserts, if desired, may be provided with the pin and aperture construction described in the Draper application above referred to.

The thread cutting or filling severing mechanism of this invention comprises a pair ofshearing blades, one secured to each jaw and in such a manner that each blade is relatively immovable in the direction of the opening and closing movement with respect to the jaw on which it is mounted and in such a manner as to provide for a relative lateral movement between the two blades to enable them to be held in shearing engagement. These shearing blades are mounted at the outer ends of the jaws and thus operate with the jaws and secure a clean shearing cut of filling ends extending from the cloth passing between the jaws.

In thepreferred construction illustrated, the lower shearing blade 2% is secured to the outer end of the lower jaw 5 and. the shank lfrom which it projects so that its shearing edge 25 is substantially flush with the face of the jaw. This blade is positioned, first, by fitting over the stud 17 between the lever 16 and the outer end of the shank and jaw and, second,-by fitting over a set screw 26 threaded into the shank. The rearward end of the blade 24 is sprung slightly outward or away from the lower jaw when the set screw 26 is tightened up so that this lower blade may have a slight yielding movement toward and'from the outer end of the lower jaw in order effectively to cooperate with the upper shearing blade and insure a clean shearing-cut. The upper shearing blade 27 is set into a vertical groove in, the upper jaw yieldingly pressed together, during the rel ative movements of the blades so that as the upper blade moves downward, any filling ends extending between the blades are sheared off with a clean cut. Furthermore, thejupper shearing blade 27 with the arm 8 iii which it is mounted is held snugly inward and-thus with the blade 27 further pressed against the blade 24 by a spring 31 mounted on the shaft 10 between the bearing 9 and the head32 of the shaft.

It will thus be seen that a very simple and effective filling severing mechanism is provided in. connection with this jaw type of temple'. Either or both of the shearing blades may readily be removed for sharpening, replacement or repair. The blades at all times are maintained in self-sharpening, shearing contact. In the operation of this device, the cloth being woven is normally held clamped between the temple aws by the action of the spring As the lay concludes its beat-up, swingsthe heel 21 from the position shown in Fig. 1- to the position shown in 2, thus quickly effecting the separation of the jaws and freeing the cloth, thus allowing the cloth to pass freely between the jaws and permit a fresh grip of the jaws on the cloth to be taken. Immediately the lay retracts, the

- ug 12 restores the jaws to closed gripping position and effects the shearing operation of the shearing blades which thus sever any filling ends extending from the edge of the cloth as it passes through the temple.

Having thus described the invention, what is claimed as new, and desire to be secured by Letters Patent, is:

1. A thread cutting loom temple comprising a pair of laterally extending cloth gripping and releasing jaws relatively movable vertically to effect their function, the said jaws at their outer ends having secured there to cooperating shearing blades opening-and closing withthe jaws to sever filling ends carried between them.

2. A thread cutting loom temple having the construction defined in claim 1, in which the lower blade at its rear end is sprung slightly away from the lower jaw to insure a yielding shearing engagement with the upper blade.

8. A thread cutting loomrtemple comprising a pair of laterally extending cloth gripping and releasing jaws relatively movable vertically to effect their function, a shearing blade secured to the lower jaw with its edge in the plane of the face, thereof, a. shearing blade secured to the upper jaw having a for-.

ward and downward inclined edge cooperating with the first blade, and means yieldingly to hold the said blades in shearing contact.

4. A thread cutting loom temple comprising a pair oflaterally extending cloth gripping and releasing jaws relatively movable vertically to efi'ect their function, the said jaws at their outer ends having secured thereto cooperating shearing blades opening and closing with the jaws to sever filling ends carried between them, the said blades being relatively immovable in the direction of the opening and closing movement with respect to the jaws on-which they are respectively mounted.

5. A thread cutting loom temple comprising the construction defined in claim 4, in which the said blades are relatively movable laterally to enable them to be maintained in shearing engagement.

6. A thread cutting loom temple comprising the construction defined in claim 1, in which the said blades are relatively movable laterally to enable them to be maintained in shearing engagement.

7. A thread cutting loomtemple comprising a shank, a lower fixed aw on the shank presenting an extended fiat face over whichthe cloth passes, an upper jaw hinged to the shank presenting a face cooperating with that of the lower jaw, a spring mounted between the shank and the upper jaw acting to swing the upper jaw to closed position, a cam lever fulcrumed on the shank and engaging the upper jaw and having a heel in the path of the lay and acting when moved by the lay on the conclusion of the beat-up to swing the upper jaw to open position and release the cloth, the said jaws at their outer ends having secured thereto cooperating shearing blades swinging with the jaws to open and closed positions to sever filling ends extending from the cloth passing between the jaws.

8. A thread cutting loom temple comprising the construction defined in claim? in which the lower shearing blade extends between the end face of the lower jaw and shank and the said cam lever and in which the cam lever is fulcrumed by a stud passing through and thus acting to position the lower shearing blade.

In testimony whereof, I have signed my name to this specification.

HORACE H. BURDETT. 

